#!/bin/bash
#(C) 2009 DatuX HR Meertens
#This script monitores system values and generates snmptraps

source /etc/asterisk_guardian.conf

function retrieveActiveCalls {
	return `asterisk -r -x "show channels" | grep "active call" | cut -d ' ' -f 1`
}
function sendSnmpTrap {
	#`snmptrap -e $EngineID -v 3 -u $Username -a MD5 -A $Password -l authNoPriv $Hostname "" snmpTrap .1.3.6.1.4.1.22736.1.2.5 i $1`
	`snmptrap -v 2c -c public $Hostname "" snmpTrap .1.3.6.1.4.1.22736.1.2.5 i $1`
}


#initial check
retrieveActiveCalls
PreviousActiveCalls=$?
timer=0

while(true);
do

	retrieveActiveCalls
	activeCalls=$?
	if [ $activeCalls -ge `echo "$PreviousActiveCalls+$CallDeviateValue" | bc` ]; then
		sendSnmpTrap $activeCalls
	fi
	if [ $activeCalls -le `echo "$PreviousActiveCalls-$CallDeviateValue" | bc ` ]; then
		sendSnmpTrap $activeCalls
	fi
	if [ $timer -ge $SendActiveCallsStatusInterval ]; then
		#Retrieve active calls
		retrieveActiveCalls
		activeCalls=$?
		sendSnmpTrap $activeCalls
		#reset timer
		timer=0
	fi
	PreviousActiveCalls=$activeCalls
	sleep $CallDeviateCheckInterval
	timer=`echo "$CallDeviateCheckInterval+$timer" |bc`
done